74Adam Posted May 21, 2011 Share Posted May 21, 2011 I hate asking such basic questions on this forum, but here we go. I want to have idle independent of the throttle plate and I'm not sure what size line to run. I don't want to get too big otherwise the calibration falls within a very narrow range. I'm looking at the needle valves that McMaster carries but the ones that look like they would work well all have a 1/8" orifice and that seems too small. Thoughts? This is a 3.0 liter L-28. Thanks:-) -Adam Quote Link to comment Share on other sites More sharing options...
Tony D Posted May 22, 2011 Share Posted May 22, 2011 I used a stock modified Nissan Idle Air Bypass Valve adapted to fit 1/4" fuel line, and I can easily get 2200rpms around the 60mm throttle plate (which is fully closed and sealed) without much ado at all. I don't know what orifice it has, but opening that 1/4" fully line gives me 2200 rpms, so you should be good, if not right at an 1100 rpm maximum. That should be fine for most applications. Quote Link to comment Share on other sites More sharing options...
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